Kubota SM-E3B Series User Manual

S-64
SM-E3B SERIES WSM
DIESEL ENGINE
(4) Crankshaft
Crankshaft Side Clearance
1. Set a dial indicator with its tip on the end of the crankshaft.
2. Measure the side clearance by moving the crankshaft to the front
and rear.
3. If the measurement exceeds the allowable limit, replace the
thrust bearings.
4. If the same size bearing is useless because of the crankshaft
journal wear, replace it with an oversize one referring to the table
and figure.
(Reference)
• Oversize thrust bearing
• Oversize dimensions of crankshaft journal
W11586190
Crankshaft Alignment
1. Support the crankshaft with V blocks on the surface plate at both
end journals.
2. Set a dial indicator with its tip on the intermediate journal.
3. Measure the crankshaft alignment.
4. If the measurement exceeds the allowable limit, replace the
crankshaft.
W11613530
Crankshaft side
clearance
Factory spec.
0.15 to 0.31 mm
0.0059 to 0.012 in.
Allowable limit
0.50 mm
0.020 in.
Oversize Bearing Code Number Marking
0.20 mm
0.0079 in.
Thrust bearing 1 02 15261-23950 020 OS
Thrust bearing 2 02 15261-23970 020 OS
0.40 mm
0.016 in.
Thrust bearing 1 04 15261-23960 040 OS
Thrust bearing 2 04 15261-23980 040 OS
Oversize
0.20 mm
0.0079 in.
0.40 mm
0.016 in.
Dimension A
46.10 to 46.30 mm
1.815 to 1.822 in.
46.30 to 46.50 mm
1.823 to 1.830 in.
Dimension B
23.40 to 23.45 mm
0.9213 to 0.9232 in.
23.80 to 23.85 mm
0.9370 to 0.9389 in.
Dimension C
1.8 to 2.2 mm radius
0.071 to 0.086 in. radius
1.8 to 2.2 mm radius
0.071 to 0.086 in. radius
(0.8S)
The crankshaft journal must be fine-finished to higher than ∇∇∇∇.
Crankshaft alignment Allowable limit
0.02 mm
0.0008 in.
KiSC issued 03, 2011 A

Kubota SM-E3B Series Specifications

General

Brand	Kubota
Model	SM-E3B Series
Category	Engine
Language	English